Hi, thanks for the detailed report, your setup info really helped.
I couldn't reproduce it in emulators, but I think I know what's happening. The game is 4 MB and also uses save memory for high scores and options. On some flash carts, the save memory can end up covering the second half of the ROM, which is exactly where all the level graphics live. That gives a fine title screen and a white, glitchy screen as soon as the game starts.
Could you try the test build I added (It's v1.7 with saving turned off (no high scores or options kept after power-off).
Two quick questions too:
- Does the white screen appear when the first level starts (right after the menu or the intro)?
- Did v1.6 behave the same way for you?
If the test build plays fine, I'll know exactly what to fix, and the real update will keep saving. Thanks!